Window-scaffold



NITED STATESv PATENT OFFICE.

HARRY W. BULLOCK, OF CHAPPAQUA, NEW YORK.

wlNnow-soAFFoLD.

SPECIFICATION ferming part of Letters Patent No'. 536,265, dated March42e, 1895.

Appucetienmeazrune 3,1894. serrure. 513,853. (Nomar) To a/ZKZ whom t mayconcern,.-

Be it known that I, HARRY W. BULLOOK, a citizen of the United States,and a resident of Chappaqua, in the county of Westchester and State ofNew York, have invented certain -new and useful Improvements in Window-Scaffolds, of which the following is` a specification.

This invention relates to scaffolds of that class which are adapted tobe applied to windows and secured by a bracket bearing against the outerwall of the building beneath the window and by a rod or beam bearing onthe inside of the sill or frame.

The' object of my invention is to provide a device of this characterwhich may be folded up when not in use for readiness, of transportation;which shall adj ust itself with respect to the window-frame, and to thehorizontal distance between such and the wall of the building; andfurther to produce a scaold of this class which'may be cheaplyconstructed and yet be of such strength as to endure the heavieststrains.

The invention consists in the novel construction and arrangement ofparts hereinaf-y ter fully described. In the accompanying drawingsforming part of this specification, in which rlike letters of referencedesignate corresponding parts throughout, Figure l is a side elevationof a scaold constructed according to my invention, the brackets thereofbeing folded. Fig. 2 is a plan view of the same. Fig. 3 is a sideelevation of thedevice with the folding brackets thereof extended, andthe beam which er1- -slats are tubular blocks or spools c, which serveto maintain the said slats equidistant from each other and also inconjunction with the said bolts a to secure the same rigidly together.The nuts b are locked in place and protected by means of rectangular orother metallic plates d, screwed upon the outer sidesof the slatsAand Eat each end,immediately above the said nuts.

Upon the top and bottom of the slats A an E, at the rear end thereof orthat which projects into the room, I secure longitudinal braces orprotector-plates F, which extend from a point approximately at lthecenter of the scaffold upon the upper side thereof, around the rear endsof the slats A and E and upon the under side of the same to a point lessthan half way of its length, these protector-plates being secured to theslats by any desired means. Extending through the said platesand-through the body of the slats covered thereby are holes e, those inthe one slat aligning with those in the opposite one. Upon the innerside of the slats A and B and of the slats D and E are formed elongatedgrooves franging from a point near the rear end of the scaffold to aboutthe center thereof.

Pivoted at the forward end of the scaffold in the slats A and B and theslats D and E, are the bars G, forming part of the supporting bracket,which said bars are pivoted in the said slats by means of the pins g.These bars are of such a width as to .tit between the slats, and at thelower or free ends thereof are attached the bars H, movably secured to fthe said bars G by means of hinges h secured upon the upper sides ofeach of 'the said bars. These bars H have passing through the same `upontheir upper ends pins t', which slide in the grooves f. u At the lowerends ofthe bars G, the same are secured to each other by means of acrossbrace I, the bars H being likewise secured at the top by a similarcross-brace J, which however extends beyond the bars H and serves, whenthesame are in the upright position, to help support the slats A and E.These braces I and .l are reduced at the middle to facilitate `thegrasping thereof in operating the device. 4

The securing beam K, which engages with the frame of the window, Iconstruct of any approved shape, and of a length sufficient to extendbeyond the scaold at either side. This beam is apertu red in alignmentwith two of the holes e which extend through the protecting plates F andthe slats A and E, and the said beam is secured to the scaffold by pinsj, which pass entirely through the slats and below the lower part of theupper plate f thereof, the beam thereby being tightly held in position.

The operation of the device will be readily understood from theforegoing description taken in connection with the accompanyingdrawings,particularly to such as are conver, sant with the especialclass of devices to which my invention appertains.

The scaffold is placed upon the window-sill with the rear end thereofextending into the room and the cross-brace I is then grasped, and drawnor pushed downwardly and outwardly until the bracket assumes theposition shown in Fig. 3. The scaffold is then drawn inwardly until thelower end of the bracket bars Il abut against the outer wall of thebuilding` whereupon the beam K is laid upon the scaffold and against thewindowframe and the pins j inserted through the same and into the holese in the slats A and E. This being accomplished, the scaffold will restupon a substantial level, or with the forward end thereof slightlyraised, and will be securely maintained in such position. The painter,mason, builder or other operator may then stand or sit upon the forwardend of the scaffold outside of the window with the utmost security,which is but added to by increase of weight.

If desired, a clamp may be attached to the scaffold to secure the sameupon the outside sill of the window, but ordinarily this need not beused, care being taken not to stand or bear upon that portion of thescaffold Within the room.

Should it be desired to mount the scaffold from the outside of thebuilding, a ladder may be placed against the bracket or the scaffold oreven rested upon the cross-brace I, and the ascent or descent thereofwill not dislodge the scaffold or move the same in the slightest.

If desired a rope-ladder might be suspended from the end of the slats.

In the removal of the device, the platform is seized at the rear end andforced or tilted downwardly and rearwardly. The bracket bars H are thendrawn to the horizontal position through the agency of the cross-braceJ, the bracket thereupon closing to the position shown in Figs. l and 2,when the whole may be withdrawn into the room, or the beam K beingremoved, the scaffold may be lowered to the ground below.

I do not desire to confine myself to the exact details of constructionherein set forth and illustrated as I claim my invention to be broadlynovel in the use of the folding or collapsible bracket, in theself-securing beam, and removable pins, in the grooving of thc slats, aswell as in the other features, elements, and mechanism shown.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is--- 1. A collapsible scaffold,comprising a platform composed of a plurality of slats secured together,bars pivoted at the forward end thereof, similar bars hinged thereto andpivoted in two or more of the slats and sliding in longitudinal groovestherein, and means for holding the said scaold to the window sill orframe, substantially as shown and described.

2. A collapsible window scaffold, comprising a platform constructed of aplurality of slats, bars pivoted at each side thereof between the slats,similar bars hinged thereto at each side and pivoted in grooves in theslats extending from the center of the scaffold approximately to the endthereof, the said bars being of such a width as to rest between two ofthe slats, and means for holding the said scaffold to the window sill orframe, substantially as shown and described.

3. In a window scaffold, the combination, with a platform comprising aplurality of slats, having a plurality of holes therein at the rear, anda folding bracket pivoted thereto at the forward end and pivoted at therearin elongated grooves therein, of a beam extending across the saidplatform and beyond its sides, and pins adapted to be inserted throughthe said beam and into the holes in the slats, substantially as shownand described.

4. In a window scaffold, the combination, with a platform comprising anumber of slats secured together at each end and having longitudinalgrooves in the rear thereof, bars pivoted in the said slats at theforward end, and similar bars hinged thereto and working therein, bothof the said bars being of such a Width as to rest between the slats, ofa beam extending across the said platform and beyond its sides, and pinsadapted to be inserted through the said beam and into the holes in thescaold, substantially as shown and dcscribed.

5. In a Window scaffold, the combination, with a platform comprising aplurality of slats, bolts securing the same together at each end, nutsmounted upon the bolts, protecting plates secured over the nuts,metallic braces secured upon the upper and under sides of the outerslats, holes extending through the said braces and through the slats ateach side thereof, bars pivoted in the said slats at each side, similarbars movably secured thereto by hinges on the top thereof, and pivotedin the grooves in the slats, and cross-braces securing the forward andthe rear bars together re- IOO speet-ively,both of the said bars beingof such my invention I have signed my name, in presa Width as to restbetween the slats, of abeam ence of two witnesses, this 23d day' of May,

' extending across the said platform and be- 1894.

yond its sides, and pins passing through the HARRY W. BULLOCK. said beamand into the holes in the scaold, Witnesses: substantially as shown anddescribed. ISRAEL A. HAIGHT,

In testimony that I claim the foregoing as GEORGE W. HAIGHT.

